Hair drug testing: Many street drugs (or their breakdown products in the body) are absorbed into the hair. A sample of hair can be tested for recent drug use. Hair analysis: Testing of hair for toxic exposures, such as lead or mercury poisoning.
Gas Water Heater, water not hot enough-Thermostat or Sediment. The dip tube probably disintigrated. The dip tub sends cold water to the bottom of the tank for heating when its heated it rises to the top of the tank. Its possible that the dip tube broke of and now you have cold water mixing with the hot water on top.
You do not want ANY water in your gas tank. If you run the vehicle the water will cause incomplete combustion and if in enough quantity will damage parts. Water does not compress when in the cylinder and can cause major damage. You have two options: drain the tank if there is anything more then âcondensation'.